Analog Devices Inc. AD6657ABBCZ

The AD6657ABBCZ is an 11-bit, 200 MSPS (Mega Samples Per Second) quad-channel intermediate frequency (IF) receiver produced by Analog Devices Inc. This device is specifically designed to support multiple antenna systems in telecommunication applications, where high dynamic range performance, low power consumption, and small size are critical.

It features four high-performance analog-to-digital converters (ADCs) and integrated noise shaping requantizer (NSR) digital blocks. Each ADC uses a multistage, differential pipelined architecture with integrated output error correction logic and a wide bandwidth switched capacitor sampling network. The device also includes an integrated voltage reference and a duty cycle stabilizer (DCS) to maintain excellent performance despite variations in the ADC clock duty cycle.

• Quad-channel IF receiver with 11-bit resolution and 200 MSPS sampling rate per channel.
• Integrated noise shaping requantizer (NSR) for improved SNR performance within a limited portion of the Nyquist bandwidth.
• Standard serial port interface (SPI) for various product features and functions, including data formatting, NSR, power-down, test modes, and voltage reference mode.
• On-chip integer 1-to-8 input clock divider and multichip sync function to support a wide range of clocking schemes and multichannel subsystems.
• Integrated voltage reference and duty cycle stabilizer (DCS) to maintain excellent performance.
• Flexible power-down options for significant power savings.
• LVDS outputs with ANSI-644 levels, supporting a digital data rate of 400 Mbps.
• Pb-free, RoHS compliant, 144-ball, 10 mm × 10 mm chip scale package ball grid array (CSP_BGA).

The AD6657ABBCZ is designed for telecommunication applications, particularly in systems that require high dynamic range performance, low power consumption, and small size. It is suitable for:

• Multiple antenna systems in cellular base stations.
• Wireless communication systems such as CDMA, LTE, W-CDMA, and WiMAX.
• Other high-performance IF sampling applications where simultaneous reception of multiple signals is necessary.

1. What is the resolution and sampling rate of the AD6657ABBCZ?

   The AD6657ABBCZ has an 11-bit resolution and a sampling rate of up to 200 MSPS per channel.

2. What is the purpose of the integrated NSR in the AD6657ABBCZ?

   The integrated noise shaping requantizer (NSR) improves the SNR performance within a limited portion of the Nyquist bandwidth.

3. What interface does the AD6657ABBCZ use for configuration and control?

   The device uses a 3-wire SPI-compatible serial interface for programming and control.

4. What is the operating temperature range of the AD6657ABBCZ?

   The device operates over an industrial temperature range of −40°C to +85°C.

5. What is the package type and size of the AD6657ABBCZ?

   The device is packaged in a Pb-free, RoHS compliant, 144-ball, 10 mm × 10 mm chip scale package ball grid array (CSP_BGA).

6. What are the typical supply voltages for the AD6657ABBCZ?

   The typical supply voltages are 1.8 V for both AVDD and DRVDD.

7. How does the AD6657ABBCZ support power savings?

   The device offers flexible power-down options to achieve significant power savings.

8. What is the digital output format of the AD6657ABBCZ?

   The device outputs data in LVDS format with ANSI-644 levels, supporting a digital data rate of 400 Mbps.

9. What are some common applications for the AD6657ABBCZ?

   Common applications include multiple antenna systems in cellular base stations and other wireless communication systems like CDMA, LTE, W-CDMA, and WiMAX.

10. Does the AD6657ABBCZ support multichannel synchronization?

    Yes, it supports multichannel synchronization through its on-chip integer 1-to-8 input clock divider and multichip sync function.